None of this can happen without copying.
没有复制这一切都不可能发生。
I would like to store only the first 3 bytes, without copying the remaining 32 bits.
我想商店只有第一个3字节,但不复制其余32位。
By using a reference parameter, the function can access the object directly without copying it.
使用引用形参,函数可以直接访问实参对象,而无须复制它。
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